8 letters · 16 points in Scrabble
noun roller that has teeth on the rims to pull film or paper through
noun thin wheel with teeth that engage with a chain
noun tooth on the rim of gear wheel
originUnknown. First attested in the 16th century. Perhaps related to Italian rocchetto (“spool”), spoletta (“spool”), sprone (“spur”), or English spoke, spike, spur.
Etymology from Wiktionary, CC BY-SA 3.0